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GRID/FILTER RATIO

Physics

GRID/FILTER RATIO

1. This is the ratio between the depth of the interspace channel divided by it’s width: grid ratio = d / w.
2. A typical ratio is 8:1.
3. The larger the grid ratio, the smaller the angle of acceptance (θ) and the better the contrast.
4. Antiscatter grids typically improve the contrast by a factor of 2 - 4.


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REFERENCES

1. Bushberg, J. T. (2012). The essential physics of medical imaging. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. Find it at Amazon
2. Heggie, J. C., Liddell, N. A., & Maher, K. P. (1997). Applied imaging technology. Melbourne: St. Vincents Hospital.

Ⓒ A. Manickam 2018

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